community citizenship behaviors (or CCB) is defined as behaviors that are discretionary, not directly or explicitly recognized by the formal reward system of the community and that in the aggregate promote the effective functioning of the community.
darunter: 
CCB-I (FOSS Community Citizenship Behaviors oriented towards the benefits of other individuals) and CCB-P (FOSS Community Citizenship Behaviors oriented towards the benefits of the project and its community); CCB-C (citizenship behaviors directed towards the community).